Using the Kaplan–Meier method, ECOG-PS 0, Alb levels ≥4.2 g/dL, Hb levels ≥13.2 g/dL, CRP levels <0.21 mg/dL, clinical T stage ≤2, clinically negative LN status, and tumor size <30 mm were significantly associated with better CSS; however, age, NLR, PLR, number of LNM, and pretreatment were not significantly associated with CSS. This evidence concerns the gene GSTM1 and neoplasm.